Remove routing

[Michaël Gallego]

For now, ZfrOAuth2 is based on Stratigility and provides its own routing:

https://github.com/zf-fr/zfr-oauth2-server/blob/master/src/Server/AuthorizationServerMiddleware.php#L50-L52

I think that we should remove that, and the app consumer is responsible to register its own routes. Then, each action (handleToken, handleRevocation...) should have its own action middleware that only does the given task.

[Michaël Gallego]

ping @basz

[Bas Kamer]

agreed. lets merge #38 first

[Bas Kamer]

done in #44